Also to drift back slightly towards the original topic...
Since I mentioned Aerostich recently, I have long worn one of their “triangles” while riding. They’re nylon on the “outside” and fleece on the “inside” and attach with Velcro. Good for keeping a little warmer in the winter, keeping sun off my neck and in the summer can be wetted for evaporative cooling*.
In the days of COVID, I find it’s my go-to mask as well:
Works well and very comfortable and I think the two disparate layers would be fairly effective keeping the virus at bay. Has so far.
*There is also something designed for that express purpose, called an Evap-O-Danna. Keeping my neck cool in the heat of the summer helps cool my brain. And, I agree with Woody Allen: It’s my second-favorite organ!